In half duplex transmission messages can move in either direction , but only one way at a time. The press to talk radio phones used in police cars employ the half-duplex standard; only one person can talk at a time. Often the line between a desktop workstation and a remote CPU conforms to the half duplex patterns as well. If another computer is transmitting to a workstation, the operator cannot send new messages until the other computer finishes its message to acknowledge an interruption.
Full duplex transmission works like traffic on a busy two way street the flow moves in two directions at the same time. Full-duplexing is ideal for hardware units that need to pass large amounts of data between each other as in mainframe-to-mainframe communications.
In half duplex transmission messages can move in either direction , but only one way at a time. The press to talk radio phones used in police cars employ the half-duplex standard; only one person can talk at a time. Often the line between a desktop workstation and a remote CPU conforms to the half duplex patterns as well. If another computer is transmitting to a workstation, the operator cannot send new messages until the other computer finishes its message to acknowledge an interruption.
Full duplex transmission works like traffic on a busy two way street the flow moves in two directions at the same time. Full-duplexing is ideal for hardware units that need to pass large amounts of data between each other as in mainframe-to-mainframe communications. Full duplex transmision is a two way transmission
Half Duplex: Transmission is found in many systems such as inquiry applications where in a DTE sends a query to another DTE and waits for applications process to access and or compute the answer and transmit the response back. Terminal based system often use half-duplex techniques.
Full-duplex: Providing for simultaneous two way transmission, without the intervening stop-and-wait aspect of half duplex. Full duplex is widely used in applications requiring continuous channels usage.
Thus for, the terms half duplex and full duplex have been used to describe how data move across the circuits. we have focused on these terms as they are used in the data communication industry. the physical circuit itself, without regard to how data moves. some people in the industry use half duplex and full duplex to describe data flow and the physical circuit it self.
This is a Simplex 2 way radio example:
simplex:
one transmit others receivers and uni directional like TV and Radio
half duplex:
two way communication but one at a time, wireless microphones
full duplex:
two way communication but both at a time like skype and telephone
Usually, the communication range of a walkie-talkie (radio station) is understood as the maximum distance at which the exchange of information between the receiver and the transmitter with a given quality is ensured. As a rule, such an exchange should be possible at any time, and for mobile communications it should also be possible throughout the entire serviced territory. Therefore, when they talk about the communication range of a radio, it is necessary to clarify at what time and place communication is possible. For example, a communication range between mobile radios from hytera indonesia of 10 km with 90% coverage means that on average in 9 cases out of 10 communication between radio stations will be successful, and communication sessions are possible at arbitrary times and in randomly selected places.
Duplex system is used in practically all communication networks, moreover to allow for a contact "two-way street" amid two linked parties or to supply a "reverse path" for the monitoring and inaccessible adjustment of tools in the field. A half duplex system supplies communication in both paths, but only one path at a time. Characteristically, once a party starts to receive a signal, it must hold on for the transmitter to stop transmitting, prior to replying.
A full duplex system basically permits communication in both directions, and dissimilar to half duplex, permits this to take place simultaneously. Land line telephone networks are a good example of full duplex system since they permit both the caller to speak as well as be heard at the same time.
Duplex and Full Duplex can be shown by speakerphones. A duplex speakerphone, the speaker cuts out when you talk as it can only do one at a time whereas a full duplex phone you can hear and speak at the same time (makes it more convenient so you don't talk over someone else talking on a conference call.).